Other people have other goals, and sometimes the BSD style licenses are better for those goals. I personally tend to prefer the GPL, but that really doesn't mean that the GPL is any way inherently superior - it depends on what you want the license to do.
Linus TorvaldsDon't ever make the mistake [of thinking] that you can design something better than what you get from ruthless massively parallel trial-and-error with a feedback cycle. That's giving your intelligence much too much credit.
Linus Torvalds